Help with countering "Da Vinci Code"

Trey has been reading The Da Vinci Code and it has really done a number on him. He is relatively young in the faith, and the stuff in this book has planted seeds of doubt in him. I'm really angry about that—not at him, but at this book! He was making steady progress, getting stronger, enduring mocking and encouraging other inmates. Then, it seems, that the devil went on the counterattack.

Trey is a reader; I believe he would be helped if he could get his hands on something intellectually sound from a Christian perspective. If anyone knows of solid Christian resources to refute the false claims made in this book, I would appreciate you posting a comment.

Thanks. And please pray for Trey.